The crude incidence rate (CIR) of TB is crucial for exploring its spatial distribution. By calculating the proportion of TB cases to the mid-year population, the spatial distribution becomes more comparable across different regions. Using the following equation:

\[ \text{The crude incidence rate (CIR)} = \frac{\text{Number of TB Cases}}{\text{Mid-Year Population}} \times 100,000 \]

The unit of the crude incidence rate (CIR) in this research is expressed as cases per 100,000 population.